"We have fully investigated all reports of data loss, identified and fixed all known issues in the update, and conducted internal validation," said Microsoft Windows Director of Program Management John Cable in the post.

Microsoft is now rereleasing an updated version of the October 2018 Update to its Windows Insiders, the company's testing program that lets users register for prerelease builds of the operating system.

If you did manually update with the initial rollout and have an issue with missing files after the update, you should use the affected device as little as possible and contact Microsoft directly at 1-800-MICROSOFT, or find a local number in your area. According to the post, Microsoft support and its retail stores' customer service personnel will help you out at no charge.